Compound centrifugal pump.



J. C. SOEMER, comPouno CENTRIFUGAL PUMP.

APPLICATION FlLEDJU11E19. I915.

Patented May14, 1918.

2 SHEETS-SHEET 1 ill/m Witnesses:

mt f

J. C. SOEMER.

COMPOUND CENTRIFUGAL PUMP.

APPLICATION FILED IUNE 19. 1915.-

1,266,072. PatentedMay 14', 1918.

2 SHEETS-SHEET 2.

Witnesses:

JOSEPH C. SOEMER, OF NEWARK, NEW JERSEY.

COMPOUND GENTRIFUGAL PUMP.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed June 19, 1915. Serial No. 35,015.

To all whom it may concern:

Be it known that I, JOSEPH C. Sonnnn, a citizen of the Fnited States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Compound Centrifugal Pumps, of which the following is a specification.

This invention relates to compound can trifugal pumps. and belongs to that type wherein the casings and the impellers within them are arranged in sets and increase in size from smaller to larger diameters, correspondingly adding to the velocity of the water by their operation.

This invention comprises two sets of cas ings connected together by a portion provided with suction chambers and connected with an intake. The casings have a common discharge conductor termed in the description a manifold. and means are provided, including a valve in the manifold and a valve in the intake, by which the discharge of both sets of casings may be carried off by the manifold, or, the discharge of the set of casings on one side may be sent through the impellers and casings of the other set, with a consequent increase in the speed and pressure of the water acted upon.

The construction and arrangement of the parts of this invention are set out in the accompanying drawings, of which Figure 1 represents a top plan view, with the bearings for the shaft and the base casting omitted. Fig. 2 is a side view showing the upper half of the casings and impellers in vertical section. Fig. 8 is a vertical section on the indirect broken line wac of Fig. 1. Fig. 4 is a vertical section on the indirect broken line w-y of Fig. 1. Fig. 5 is an explanatory cross section of the intake, showing the two passages therein, and also showing which of those passages is controlled by the check valve illustrated.

-Throughout the drawings and description the same letter is employed to refer to the same part.

Considering the drawings, the shaft A runs centrally through the casings, and, toward one end of the shaft are carried one set or group of impellers B, C, and D, corresponding in size and operating Within the casings 6, c, and (Z. Toward the other end of the shaft is another set. or group comprising the impellers E and F, in casings e and f.

It will be noted in Fig. 1, that the two sets of casings are connected by the waist portion a, and that the intake G, Which is provided with the two passages H and j. leads to the waist a, and the passages of the intake are open into the suction chambers h and j of the waist. In the passage H is placed a check valve g, which will be again referred to herein.

From the sets of casings the discharge pipes K and 76 extend to a common discharge pipe or manifold L, and the manifold is interrupted as illustrated by a plug valve M. The plug valve M is located at the junction of the manifold L and an intermcdiate conduit. m that leads to the passage ll of the intake. The passage H is the one controlled by the check valve g. The valve M is constructed to close, when suitably turned, either the passage through the manifold or the intermediate conduit m.

To explain the operation of this invention, let it 'be assumed that the valve M is arranged to close the intermediate conduit m. leaving the passage through the .manifold L open. Under such'conditions the discharge of both sets of casings is directly into the manifold L as a common outlet. A large amount of water is thus acted upon, but acquires a relativelylower velocity. If, however, the valve M be turned so as to close the passage through the manifold L, and to direct the flow from the casing cl into the left hand portion of the manifold L, through the intermediate conduit m, thereby closing the check valve 9, and send ing the water into the suction chamber h of the waist, the water is taken up by the impellers E and F, and all the water, although less in. quantity than before, has impressed upon it the velocity of the impeller F. The

higher the velocitygiven to the water the greater its pressure will become as the easing confining it gradually expands into the outlet end of the manifold L.

Having now described this invention, and explained the mode of its operation, what I claim is In a compound centrifugal pump, the combination with two separated sets of pump casings, the larger portion of one set of casings being greater in diameter than the larger portion of the other set, of impellers revoluble within the said pump casings, an intake pipe located between the said sets of casings and divided lengthwise into passages, one of the said passages being connected with one set of casings and the other passage being connected with the other set. of pump casings, a check Valve arranged in one of the said passages to close the said intake passage leading to the pump having the said portion of larger diameter, each of the said pump casings having a discharge pipe, a manifold discharge pipe connecting the said discharge pipes from the casings, an intermediate conduit connecting the said manifold and the passage controlled by the said check valve, and a handoperated valve located at the junction of the said intermediate conduit and manifold whereby the water discharged from the, pump casing having the said portion of lesser diameter may be directed into the, easings having thesaid portion of larger diameter and its velocity increased.

In testimony whereof I atlix my signature in presence of two Witnesses.

JOSEPH C. SOEMER. VVit-nesses AUGUST Sommn, FRAXK A. SOEMER. 

